How does the sun revolves from the sun?

To be exactly technical about it, the earth and sun do both revolve, around their "common center of mass". The common center of mass is the point where the pivot would have to be in order for the sun...

It doesn't, we do!

No.

Yes, it revolves around the Milky Way Galaxy.

of course not. But the sun is somewhat special in the fact that it is a lone star, most stars exist as part of binary or tertiary systems and other multi star clusters.